Its very wide subject [ no pun intended] from what I can see, vara has a ack fame The introduction of dsss , did provided the ability to recover signals from the noise , as part of a DSP process To sp

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Graham, I'm sorry but this is all a bit confusing. DSSS is not at all related to pulling a signal out of the background noise. - Just like Chirp spread-spectrum, it can be used to deal with interferen

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Hi Kristoff contrast and compare May be on different subjects , Burst , detectable Sigle shot ....something in or under the noise , would be classically defines as ' low probability of intercept ' ie

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Hi Graham, Thanks for the very long reply. Two points: But there is something I do not understand: You have mentioned 'burst' a couple of times, but -whatever it may be- if it inside the noise, the re

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Hi Kristoff Thread is a little wide to , pick up all the points amazed , no live psk on the bands , must admit , it was never too robust , worked nicely on the higher bands , where not too much 'turbu

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Hi Graham, OK, with a couple of days of delay, some more quick replies. (inline reply) Well, this still leaves me with the question I started with. Concerning APSK and QAM, in the video there was an e

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kristoff I guess that was the main idea of the video. just demonstrating , the summation of differing modulations, to provide the maximum loading , of a single carrier , From there on, things take on

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Hi Graham, Thank you for your very long reply. OK. Let's see if I understand this correctly. So, if I understand this correctly, the goal of the videos is just to show the principle that multi-order P

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Kristoff Its never immediately obvious , from the video, the issues round the pk-pk levels of the vara modem are perhaps , a little more translucent [as opposed to transparent ] as are the various dis

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Hi Steve, First of all, I am still pretty new to learning digital communication. (currently playing around in GNU Radio trying to learn PSK demodulation ...). Thank you for your reply. First of all, n

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Hi Kristoff , Without getting into the complex details as to why, In the Military as well as a number of Commercial and even some Amateur Radio waveforms these days, as you strive to increase the Over

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Hi, I'm a bit puzzled about this. After watching the video, I I understand that QAM and APSK are two different systems, each with their advantages and disadvantages, and either with the specific useca

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Fun -) Yes, Ros allays maintained designing digital modes, was his Hobby I thought that series of videos posed by R&S , gave a good over view, as many asked as to what exactly the , varying patterns r

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Monitor function locks up VARA . Point being made , ''It appears to only show up in certain pc configurations'' Some background, The monitor was coded to provide off air monitoring , but , where as th

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There seem to be quite a few on the Canadian side: Callsign: VA3ETN-10 Frequency: 144.930 MHz Callsign: VE3ZPW-10 Frequency: 145.090 MHz Frequency: 446.950 MHz They look to be about 50-65km from your

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Olivia , very interesting info. I will have to look in to whether there is anything like that in western New York . Last I checked , there were no FM VARA stations within 150 miles of my QTH. Andy

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Hi Andy, Here in SoCal we have a collaboration project we call the "VARA FM Autobahn". It connects Ventura, Los Angeles and San Diego County ARES groups and CREBC in Tijuana. The goals are to provide

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Reasonable , not “resonance “ Andy

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Hi Graham, QAM is fun, working to develop Military data modem and ALE serial tone modem QAM waveforms. In my attached photo the QAM waveform in the constellation display is an MS110B offering, going i

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How is the use of VARA on FM going ? Is there a country where a resonance network of FM stations have developed ? Andy

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